Double-acting internal combustion engine



y 1934 E. ATTESLANDER 1,956,940

DOUBLE ACTING INTERNAL COMBUSTION ENGINE Filed March 19, 1951 Patented May 1, 1934 UNITED STATES PATENT OFFICE DOUBLE-ACTING INTERNAL COMBUSTION ENGINE Application March 19, 1931, Serial No. 523,743 In Switzerland March 22, 1930 1 Claim.

This invention relates to double-acting internal combustion engines of the kind having piston-controlled inlet and exhaust ports which are uncovered by the piston towards the end of its 5 travel in each direction and serve for the admission of the charge to and the escape of the burnt gases from both working chambers.

According to this invention each inlet port is so inclined to the axis of the cylinder as to direct the charge towards one end of the cylinder at the end of the travel of the piston in one direction, whereas the charge is directed towards the other end of the cylinder at the end of the travel of the piston in the other direction by a deflecting surface on the piston.

A construction according to the invention is illustrated diagrammatically and by way of example in the accompanying drawing, in which Figure 1 is a section of the cylinder containing the inlet ports, showing in elevation the piston in the upper dead center position.

Figure 2 is a view similar to Figure l with the piston at the lower dead centre, and

Figure 3 is a part section showing both the inlet and exhaust ports.

In the construction illustrated in Figures 1 and 2, the cylinder 1 has inlet and exhaust ports which serve for the admission of the charge to and the escape of the burnt gases from both working chambers, the inlet port 2 only being shown. The inlet port is inclined relatively to the axis of the cylinder so that the air is introduced into the cylinder on one side of the piston in the direction of the arrow 3, that is,

towards the adjacent lower end of the cylinder Without any substantial change of direction of the air current. In order to obtain the correct direction of flow into the cylinder on the other side or end of the piston when it is in the position shown in Figure 2, the end of the piston is shaped as shown at 4 so that the air introduced through the inclined port 2 is deflected towards the adjacent end of the cylinder in the direction of the arrow 5.

Figure 3 shows an outlet port 6 arranged substantially opposite to the inlet port 2 so that both ports are uncovered substantially simultaneously. Further, if desired, the inlet or ex haust ports or both inlet and exhaust ports may, in addition to being inclined to the cylinder axis, be so inclined that the air enters the cylinder in a direction which does not pass through the cylinder axis.

I claim:

In a double-acting internal combustion engine cylinder, inlet ports for the admission of the charge and exhaust ports for the escape of the burned gases, in both Working chambers, a piston for controlling all said ports, inclined inlet ports in the cylinder for directing the charge only so in the direction required for one working chamber, the piston being adapted to uncover said ports near the end of its travel in each direction, and a deflecting surface on said piston adapted, when admitting the charge for the other working chamber through said inclined inlet ports, to change the direction of the charge given by said inlet ports in the direction required for the other working chambers.

EDOUARD ATTESLANDER. 

